Emergency-calk.



S. H. ROBERTS.

EMERGENCY GALK. APPLIGATIONE FILED NOV.15, 1912.

Patented Feb. 16, 1915.

111T STATES PATET @FTCE.

SAMUEL H. ROBERTS, F JOLIET, ILLINOIS.

EMERGENCY-GALE.

Application filed November 15, 1912.

1 provide an improved form of emergency calk which may be readilyattached to a horses hoof to prevent slipping at times when the calks ofthe horses shoes have become worn smooth; to provide a calk of this Ikind which is adapted to project below the horses shoe in such manner asto come into contact with the pavement in advance of the shoe and whichis arranged to yield under the weight of the animal, so that it will notprevent the shoe itself from coming into proper contact with thepavement.

A specific embodiment of this invention is illustrated in theaccompanying drawings, in which Figure 1 is a perspective view of thedevice in an inverted position. Fi 2 is a vertical section showing thesame in position on an animals hoof.

The device shown comprises a solid block 1 of metal of substantiallyrectangular form having a centrally located counterbored aperture orrecess 2 extending through the same from face to face. A yielding calk 3is seated in the counter-bored portion of the aperture 2 and comprises afiat strip of metal bent to helicoidal spiral form, and having itsconvolutions formed so as to give it a downwardly converging conicalform and so as to telescope with each other, as shown in the drawings.The upper or largest convolution 4 of the spring 3 is seated in thecounter-bore of the aperture 2, and is held in position therein by meansof a plate 5 which has a contracted aperture mouth from which theremaining convolutions of the spring project. The innermost end of thespring 3 is bent downwardly to form the prong 6 of the calk. The plate 5is bent upwardly around opposite ends of the block 1, and one endthereof is flanged and provided with prongs 7 which lie approximately inthe plane of the top of the block 1 in position to enter between theshoe 8 and the animals hoof 9. The plate 5 may be secured in position bymachine screws 10,

Specification of Letters Patent.

Patented Feb. 16, 1915.

Serial No. 731,530.

as shown. A clamping member 11 is mouted at the end of the block 1,which is distant from the prongs 7, and is provided with similar prongs12 also lying approximately in the same plane as the top of the block 1.The member 11 may be formed of sheet metal of substantially the samethickness as the plate 5, and is bent to angle shape to give itstiffness and strength. The member 11 is carried by guide-rods 13slidably mounted in parallel bores in the block 1, and its position,with respect to the block 1, is adjusted by means of an adjusting screw14 which has an enlarged radially apertured head adapted to permit thescrews to be turned by a suitable instrument, such as a wire nail.

To secure the device in position on an animals foot, the prongs 7 arefirst inserted between one side of the shoe 8 and the hoof, and theblock is then swung so as to lie against the frog of the foot with theprongs 12 directed toward the space between the shoe and hoof at theopposite side of the shoe. Then the screw 15 is turned so as to forcethe clamping member away from the block 1, until the clamping member 11and the block 1 bear firmly against the inner faces of the shoe 8. Itwill be seen that at this time the prongs 7 and 12 will be firmly wedgedbetween the hoof and the shoe, and will cooperate with the faces bearingagainst the shoe to prevent all movement of the block 1. As the animalwalks, the prongs 6 will come into contact with the pavement in advanceof the shoe, and will cut into the pavement so as to prevent slipping,and will then yield so as to allow the entire lower face of the shoe tobear the weight of the animal. It is important that the prong of anemergency calk should be the first part to engage the roadway, since itinsures that the calk is driven into the pavement before any slippingcan commence. The telescoping of the convolutions of the spring insuresthat each convolution will brace the next and thereby prevent lateraldistortion of the spring in service.

Although but one specific embodiment of this invention has been hereinshown and described. it will be understood that numerous details of theconstruction shown may be altered or omitted without departing from thespirit of this invention as defined by the following claims.

v planeof the bearing face of the horseshoe and having a recess therein,and a downwardly projecting yieldable ca'lk secured in said recess.

'2. An emergency calk, comprising a support formed of relatively movableparts provided with members adapted to enter the space between theanimals shoe and hoof, one of said parts having parallel guide aperturesand the other having corresponding guide rods adapted to slidably fitwithin said apertures, means for adjusting said parts toward and awayfrom each other for clamping the same to an animals hoof, and a calkyieldingly mounted on said support.

An emergency calk comprising a block provided with a face plate havingupwardly turned opposite ends, one end of which turns outwardly to formfastening means adapted to enter between the hoof and shoe,- in combination with a complementary member mounted at the opposite end andguided to move toward and away from said block, said complementarymember being provided with fastening means directed oppositely fromthose on said block, and an adjusting screw acting between said blockand complementary member, said block having in its lower face a recesswith a contracted mouth and a resilient yieldable calk carried by saidblock. l. An emergency calk, comprising a block having an aperturecounter-bored on the lower side of said block, a helicoidal spiralspring seated in the counter-bore and having its inner end bent downwardto form a calk, a plate having therein an aperture in registry with saidblock aperture and through which said calk may extend, said aperturebeing of less diameter than the outermost convolution of said spring andsaid plate being secured over the same to retain said spring inposition.

5. An emergency calk, comprising a block having an aperturecounter-bored on the lower side of said block, a helicoidal spiralspring seated in the counter-bore and having its inner end bent downwardto form a calk, a plate having therein an aperture in registry with saidblock aperture and through which said calk may extend, said aperture Ybeing of less diameter than the outermost convolution of said spring andsaid plate be ing secured over the same to retain said spring inposition, one end of said plate being bent upwardly around the adjacentend of said block and being provided with prongs lying substantially inthe plane of the upper face of said block and adapted to enter betweenthe animals shoe and hoof for retaining said block .in position and 'aclamping member mounted at the opposite end of said block and providedwith out: wardly projecting prongs lying substantially in the plane ofthe upper face of said block.

. Signed at Chicago this 12th day of Nov;

SAMUEL H. ROBERTS.

lVitnesses:

EUGENE A. RUMMLER, EDWIN PHELPS.

Copies of this patent may be obtained for five cents each,-by addressingthe Commissioner of Patents,

Washington, D. G.

